Paleontologic resources (fossils and their associated data) are a major source of evidence of past life. They are the basis for our understanding of the history of life on Earth, and are an integral part of our planet's biodiversity.

The NPS has significant paleontological resources in more than 145 park areas. In fact, a number of parks were established specifically to preserve paleontological resources. These areas are known in the international scientific community as outstanding windows to the life of the past.

Paleontological resources in the National Park System are exceedingly diverse. In size, they range from microscopic pollen to dinosaur skeletons over 100 feet in length. They range from only a few thousand years to over a billion years old. While some fossil organisms are known from only a single specimen, others are so abundant that they are the major component of some rock formations.

This section provides guidance to park staff in managing and protecting paleontological resources.